The 2012 NFL season kicks off in less than two weeks, which means teams will start finalizing their 53-man rosters very soon. Once Week 1 rolls around, however, the focus on job security switches from the players to the head coaches. As is typically the case, several enter the upcoming season on the proverbial "hot seat."

Below is a look at the coaches who really need to win in 2012 or otherwise they may want to start polishing up their resume.

2012 NFL Head Coaches Hot Seat Rankings

Athlon Sports is counting down its 2012 NFL preseason Power Rankings with in-depth team previews, schedule analysis and more as the start of the NFL season draws near.

The San Diego Chargers check in at No. 16.

Keeping up with your favorite team can be an all-consuming task. We’re here to help indulge that need to follow all aspects of the NFL on Twitter.

For all 32 teams, we’re picking the best Twitter accounts for each franchise. They run the gamut from players, coaches, executives, traditional media, bloggers or simply accounts that keep us informed and entertained.

Whether you’re a Twitter neophyte or simply trying to spice up your feed for football season, we’re here to help. And it all starts with the San Diego Chargers official Twitter account:

NFL Training Camps open up in a little more than a week, which means players will soon start fighting for coveted roster spots. Players aren’t the only ones, however, who could be fighting for their jobs. A number of coaches enter the upcoming season on the proverbial “hot seat.”

Below is a look at the coaches who really need to win in 2012 or otherwise start polishing up their resume.

2012 NFL Head Coaches Hot Seat Rankings

Championships. Leadership. Awards. Longevity. Statistical records. Likeability. Talent development.

An NFL head coach can be evaluated with many criteria. Generally, winning championships over a long period of time is the easiest (or not-so-easiest) way to the top of any ranking. Who does more with less? Who gets his team to the playoffs the most consistently? Who is the best motivator? Whose team is best prepared come crunch time? And who has the shiny hardware to back it up?

Scheduling plays a huge role in the outcome of every NFL season. So the Athlon NFL editors will spend the next month dissecting each and every week of the 2012 slate for all 32 teams in the league.